Product Description:

The BLII-D275A servo drive is manufactured by Okuma as part of the BL Servo Drives series. Designed for industrial automation, the unit receives motion commands from a CNC or PLC and modulates power for a matched brushless motor. By managing current loops and velocity feedback, it keeps machine-tool axes, material-handling gantries, and packaging stations on their programmed paths with consistent accuracy. It mounts inside the electrical cabinet alongside other control hardware and ties into the main power bus through dedicated terminals.

The drive separates its electrical architecture into control and power sections. The control electronics run from a 100 VAC single-phase supply that is protected by a 3.2 A fuse, which helps keep low-level circuits isolated from line disturbances. For motor excitation, the power stage accepts three-phase 200 VAC at 50/60 Hz, and the same potential is routed to the Xb6 Pin 6-10 terminals for external contactor logic. An internal comparator issues an overcurrent alarm when instantaneous load reaches 150 % of the rated value, prompting the machine to decelerate before device limits are exceeded. Wiring lands on M4 terminal screws, and the split-feed design supports fault isolation during service.

The surrounding enclosure should remain below 45 °C, while the drive itself can operate safely until its heat sink reaches 55 °C. For storage, components tolerate temperatures from -20 °C up to 60 °C without insulation breakdown. Continuous operation is allowed when relative humidity stays within 75 %RH, and brief spikes to 95 %RH are acceptable if condensation is prevented. Mechanical protection extends to vibration loads of 0.5 G, supporting installation on moving gantries or press frames. These limits apply to cabinet installations where temperature, humidity, and vibration must remain within the stated ranges.